Need Help!


#1

hi…

i’m new at ruby on rails…
first i have a table with a column named status(this column use to store
a status of an access point (“online” or “offline”) after my application
have done pinging the access point)

i use a net-ping library…

how can i update the data in column status “automatically”.

can somebody explain this code?

  @nodestat = Node.all.map do |node|{
      :Status => PingExternal.new(node.ipadd)? "Online" : "Offline"}
  end

and why the status always “Online”

Any ideas would be very gratefully received!

Thank You.


#2

Few things come to mind here.
I’ve done this exact app before.
I keep my devices in a table. The Rails app just displays the
information
from the table. A background daemon does the actual monitoring.
I get alot more details in my version, including mapping what mac/ip
address are on
which switch port, and using SNMP to the switch to do discovery of
devices.

The moral of this is break you ping into a separate process/task. Then
poll yours AP’s
and update there status with ActiveRecord.

If you need some help, I can certainly give you some pointers.

glennswest at yahoo dot com dot sg
http://mentalpagingspace.blogspot.com

On Apr 7, 10:31 am, Junior Junior wangsa <rails-mailing-l…@andreas-


#3

On Apr 7, 3:31 am, Junior Junior wangsa <rails-mailing-l…@andreas-
s.net> wrote:

can somebody explain this code?

  @nodestat = Node.all.map do |node|{
      :Status => PingExternal.new(node.ipadd)? "Online" : "Offline"}
  end

A brief overview of the docs (and general convention) suggests that
PingExternal.new doesn’t do a ping, it just creates a pinger object -
all you are testing is whether that new object was nil or not.

Fred


#4

I’ve added a blog article of my network scanner.
If you need further help let me know.

http://mentalpagingspace.blogspot.com/2009/04/network-monitor-as-windows-service-in.html

On Apr 7, 10:31 am, Junior Junior wangsa <rails-mailing-l…@andreas-